Specification: OD: 11.5mm---32mmceramic discs Features:1.The frictional times is 300, 000 to 500, 000,2.Density :3.6~3.7g/cubic centimeter,3.Rigidity is 84~86 HRA,4.The thickness tolerance is less than 0.02mm, the diameter tolerance is less than 0.02mm,5. Satisfy various technical request6. Lower medium spoilage6. Good insulation performance and high temperature resistance7.Stiffness texture8. Used in all electric products and electric heating products9.OEM, ODM and OBM are welcomed